// Copyright (c) 2017 Spotify AB.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

import UIKit
import SpotifyLogin

class LogInViewController: UIViewController {

    var loginButton: UIButton?

    override func viewDidLoad() {
        super.viewDidLoad()
        let button = SpotifyLoginButton(viewController: self,
                                        scopes: [.streaming,
                                                 .userReadTop,
                                                 .playlistReadPrivate,
                                                 .userLibraryRead])
        self.view.addSubview(button)
        self.loginButton = button
        NotificationCenter.default.addObserver(self,
                                               selector: #selector(loginSuccessful),
                                               name: .SpotifyLoginSuccessful,
                                               object: nil)
    }

    override func viewWillLayoutSubviews() {
        super.viewWillLayoutSubviews()
        loginButton?.center = self.view.center
    }

    deinit {
        NotificationCenter.default.removeObserver(self)
    }

    @objc func loginSuccessful() {
        self.navigationController?.popViewController(animated: true)
    }
}
